Theia 2139

0.04 UTI

0.0

C_N

0.44

C_dens

0.75

C_C3

0.0

C_lit

0.16

C_dup

N₅₀ (P>50% members) 23

Stellar density (N₅₀/rad) 2.2 [N/pc²]

C3 classification BA

C_N 0.0 Sparse
C_dens 0.44 Loose
C_C3 0.75 High quality
C_lit 0.0 Rarely studied
C_dup 0.16 Likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Theia 2139 is a sparse, loose object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster (see Parameters). It was recently reported in the literature.

⚠️ Warning: This is likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=0.16) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Moderate extinction Near-solar metallicity Young

Cavallo et al. (2024)
Bronze sample.

Data

🔍 Search references for Theia 2139 in: SciX Simbad

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Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	201.747	-62.03	0.289	-5.675	-1.744	-99.813
Hunt & Reffert	2024	201.65	-62.024	0.29	-5.621	-1.775	-74.446
Cavallo et al.	2024	202.059	-62.084	0.289	–	–	–
Hunt & Reffert	2023	201.65	-62.024	0.29	-5.621	-1.775	-74.446

💡 Note: The UCC values are estimated from its identified members.

Reference	Year	Dist [kpc]	Av [mag]	DAv [mag]	Age [Myr]	[Fe/H] [dex]	Mass [Msun]	B_frac	BSS
UCC	99999–	2.875	2.8	2.54	32	-0.050	495	–	–
Hunt & Reffert	2024	–	–	–	–	–	495⁽¹⁾	–	–
Cavallo et al.	2024	2.56	2.74	–	52	-0.050	–	–	–
Hunt & Reffert	2023	3.19	2.86	2.54	11	–	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
G3CC 11	84.0	201.72	-62.03	0.29	-5.71	-1.74	-163.49	0.5
CWNU 4031	32.0	202.08	-62.07	0.3	-5.59	-1.77	-36.14	0.11

💡 Note: The % column shows the percentage of members that Theia 2139 shares with each listed object.

Visualization

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